The sentence is in indirect speech and reporting verb is in past tense. Hence, past tense i.e. was discovered ..... should be used here.

Correct Option: C

The sentence is in indirect speech and reporting verb is in past tense. Hence, past tense i.e. was discovered ..... should be used here.

Make use of somebody/something = to use something/ somebody, especially in order to get an advantage. Hence, of such opportunities ...... should be used here.

Correct Option: C

Make use of somebody/something = to use something/ somebody, especially in order to get an advantage. Hence, of such opportunities ...... should be used here.

Look at the sentence He was elected (as) MP for Oxford East. Hence, it is not proper to use ‘as’ here.

Correct Option: B

Look at the sentence He was elected (as) MP for Oxford East. Hence, it is not proper to use ‘as’ here.

Want (not usually used in the progressive tenses) = to have a desire or a wish for something.
Look at the sentence : All I want is the truth. Hence, Present simple i.e. People want should be used here. The sentence shows a general wish/ desire.

Correct Option: A

Want (not usually used in the progressive tenses) = to have a desire or a wish for something.
Look at the sentence : All I want is the truth. Hence, Present simple i.e. People want should be used here. The sentence shows a general wish/ desire.

The sentence shows past time. Hence, Past perfect i.e. people who had come to hear him ...... should be used here.

Correct Option: C

The sentence shows past time. Hence, Past perfect i.e. people who had come to hear him ...... should be used here.